#include <iostream>
using namespace std;

#define Day 7 //常量设置方式1

int main()
{
    // 只是一个注释

    // int a = 10;
    // cout << "a = " << a << endl;

    const int month = 12; //常量设置方式2：const
    
#if 0 //预处理，判断如果是0就不处理，是1就编译
    const int month = 12;
    const int month = 12;
    const int month = 12;
    const int month = 12;
    const int month = 12;
    const int month = 12;
    const int month = 12;
#endif //也是一种注释方案

    cout << "一周有：" << Day << "天" << endl << "一月有：" << month << endl;

    system("pause"); //卡住方便看结果

    return 0;
}